ICD-10 Code H11.431 – Conjunctival hyperemia, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.431 – Conjunctival hyperemia, right eye
What it is
This code identifies redness of the conjunctiva in the right eye. It describes increased blood flow or visible dilation of surface vessels, not a specific underlying disease.
Clinical signs
Typical findings include a red or bloodshot right eye and visible conjunctival vessel injection. Clinical features vary; refer to documentation if the note also mentions pain, discharge, trauma, or another eye disorder.
When to use this code
Use H11.431 when the provider documents conjunctival hyperemia limited to the right eye. It fits cases where the redness is the primary recorded finding and no more specific diagnosis is stated. If the note names an underlying cause, code that condition instead when appropriate.
Do not use for
Do not use this code for left eye, bilateral, or unspecified conjunctival redness. Check documentation if the record describes conjunctivitis, subconjunctival hemorrhage, or another distinct eye condition.
Coding tip
Always match the laterality in the note; right eye specificity is required for H11.431.